Method of making cone-clutch facings.



I E. F. KELLEY, 4- METHOD OF MAKING CONE CLUTCH FACINGS.

APPLICATION FILED FEB. 3, I915- Patented Apr. 25, 1916.

llllllllllllll/ll/ llllllll/I/Il/l/I/l ////////l////// mmmmmm n raEDWARD F. KELLEY, 0F BRIDGEPORT, CONNECTICUT, ASSIGNOR TO THE ROYALEQUIP- MENT COMPANY, OF BRIDGEPOR'I, CONNECTICUT, A CORPORATION OFCONNECTICUT.

' METHOD OF MAKING CONE-CLUTCH FACINGS.

Specification of Letters Patent. Patmite l A pr, 25, 1916,

Application filed February 3, 1915. Serial 1%. 5,951.

1 b all whom it may concern:

lie it known that I, Enwano F. KELLEY, a citizen of the United. States,residing at Bridgeport, county of Fail-field, State of Connecticut, haveinvented an Improvement in Methods of Making lone-Clutch Facings, ofwhich the following is a specification.

This invention consists of a novel method of making tapering asbestoscone-clutch facings which shall be of uniform size, of uniform taper,and of uniform thickness so that every facing shall have the exact taperof the corresponding clutch members, every portion of the inner side ofthe facing engaging the male clutch member and every portion of the(inter side of the facing engaging the femzlle clutch member, withoutmachining or anv additional operations, every facing being ready for usewhen it leaves the dies.

It has heretofore been practically impossible, so far I am aware, toproduce, without machining, asbestos club facing, that were not roughand irregular, and of uneven thickness and therefore unable to grip allportions of the face of ither clutch member. These objections I whollyovercome and am enabled by my novel method to produce asbestos clutchfacings smooth and even on both faces, of uniform thickness in allportions and having the exact taper of the clutch members with whichthey are to be used. I

In the accoi'npanying drawing forming a part of this SPQClllCtltlOIl,Figure 1 is a per-- spective view of a piece of woven asbestos tape;Fig. 2 a perspective view of a roll of asbestos tape coiled edgewise;Fig. 3 an I elevation of a sector-shaped blank of the material; Fig. 4 aperspective view showing the ends of the blank brought together andsecured, by a staple; Fig. 5 a similar view showing the facing afterhardening, and Fig. (3 is a sectional view illustrating the finaloperation of slurping, condensing and smoothing the hardened facing bydies under pressure. In carrying out my invention I use ordinary wovenasbestos tape, either with or without longitudinal wire strands. Thisas-i bestos tape is immersed in a suitable hardening compound which isadapted to give to the facings the necessary tensilestrength and wearresisting, heat proof and water dies are heated.

such a hardening compound maybe formed of linseed oil-andsilicate'ofsoda combined. u The saturated asbestos tape, .while soft, is

then coiled edgewise on a mandrel and dried thereon. Heat may or may notbe applied, as preferred. in the operation of drying. After the edgecoil of asbestos tape has been dried. it is removed from the mandrel andsector-shaped blanks (see Fig. 3) are cut therefrom. The ends of theseblanks are then brought together and fastened in any suitable manner, asby staples 1.0 (see Fig. 4) one or more staples being used, depending ofcourse upon the width of the facings. The last step in the method is thesubjecting of the hardened facings to great pressure in dies by whichthey are accurately shaped, condensed and smoothed. It will of course beunderstood. that in coiling the saturated tape edgewise upon a mandrel,the inner edge of the coiled tape is necessarily puckered more or less,as indicated in Figs. 2 and As the facings are tapering, there. isnecessarily an extra amount of material unevenly disposed, at the smallend of the facing. In the d rymg operation moreover, the facings tend towarp more or less, and they come out of that operation very hard, ofuneven thickness and of irregular shape.

11 denotes the male die and 12 the female die. The maledie is providedwith a circulal' shoulder 13 and the female die with a circular shoulder14. Between these shoulders and between the respective faces of the maleand female dies, is a space 15 which is the exact size regards width,thickness and taper, that is required of the finished facing to give itperfect contact with the faces of the two clutch members with which itis to be used.

It is immaterial so far as the present invention is concerned whether ornot the I preferably however use cold dies and effect the shaping,condensing, and smoothing of the hardened facings by the application ofgreat pressure.

Having thus described my invention I,

1. The method of making cone-clutch the coils ing the ends of each ofsaid sector-shaped blanks, and finally shaping,

ing the facings by facings which consists in saturating asbestoe tapewith a hardening solution, coiling saturated tape edgewise, cutting thetape into sector-shaped blanks, joincondensing an smoothing the blank bypressure. 2. The method of making cone-clutch facings which consists incoiling saturated asbestos tape edgewise, cutting the coiled tapeinto-sector-shaped blanks-joining the ends of each of said sector-shapedblanks, and then shaping, condensing and smoothpressure.

3. The method facings which consists in saturating asbestos tape With'ahardening solution, coiling the saturated tape edgewise,

cutting the coiled tape into sector-shaped blanks, drying, joineach ofsaid sector-shaped and then subjecting to pressure to of makingcone-clutch give to the finished facings uniform thickness, taper andWidth.

l. The method of making cone-clutch facings which consists in coilingsaturated asbestos tape edgewise, cuttingsector-shaped blanks from thecoil, joining'the ends of each of the blanks, and then finishing bypiessure.

5. The method of making clutch facings which consists in coilingsaturated asbestos tape edgewise, cutting the coiled tape intosector-shaped blanks, joining the ends of each of said sector-shapedblanks and then finishing by pressure.

In testimony whereof I in presence of two witnesses.

EDWARD F. KELLEY. \Vitnesses S. SIMPsoN, ARTHUR C. MACY.

aliix my signature

